"With success, I've been able to sort of calm that down and go, 'OK, I don't have to be guns a-blazin' all the time. People are listening, so I can open up my softer side and show people who the whole Miranda is,'" she revealed of her more emotional sound.

Some of this transformation is due, in part, to being married to fellow country star Blake Shelton for almost three years. Rumors of their romance have been dragged through the press, but both promise they're still going strong.

"It just feels like you can't do anything for yourself anymore," she said of the weight loss. "Have you ever thought I might just be turning 30 and trying to get a little ahead of the game? Isn't that just a normal thing to do?"